UV Index in Porto Alegre, Brazil

Latitude30.03°S
Elevation46m
ClimateSubtropical
UV Patterntemperate

Hot summers and mild winters. Strong UV from spring through fall, moderate in winter.

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Typical UV by Season

Estimated peak UV values based on latitude (Southern Hemisphere)

Spring

Sep - Nov

~6High

Summer

Dec - Feb

~9Very High

Fall

Mar - May

~5Moderate

Winter

Jun - Aug

~3Moderate

Calculate Your Vitamin D

Get a personalized estimate of how much vitamin D you can produce in Porto Alegre based on your skin type and sun exposure.

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Understanding UV in Porto Alegre

The UV index measures ultraviolet radiation strength. Higher values mean faster vitamin D production but also greater sunburn risk. UV varies by:

  • Season - Sun angle changes throughout the year
  • Time of day - Peak UV is between 10am and 4pm
  • Cloud cover - Clouds reduce UV by 25-50%
  • Altitude - UV increases ~10% per 1000m elevation
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